30 results about "Hydromechanical coupling" patented technology

The invention relates to a method for regulating the maximum speed of a working machine (12), in particular an air compressor in a vehicle. Said working machine is driven by means of a motor (10), using a hydrodynamic coupling (11), which comprises a working chamber (3) that is partially or fully filled with a working medium for transmitting a torque from a drive side (11.1) equipped with an impeller (1) to a driven side (11.2) equipped with a turbine wheel (2). The method comprises the following steps: the speed of the working machine, of the driven side of the hydrodynamic coupling, of the drive side of the hydrodynamic coupling and / or of the motor is detected; a maximum permissible value for the speed is defined and compared to the detected speed; if the detected speed exceeds the maximum permissible value, the quantity of working medium in the working chamber of the hydrodynamic coupling is automatically reduced by the opening or passage of medium through an outlet that is connected to the working chamber.

A centrifugal pump for conveying a process fluid is proposed, having a pump unit, a drive unit for driving the pump unit, a pump inlet for receiving the process fluid and a pump outlet for dischargingthe process fluid, wherein the pump unit comprises at least one impeller for conveying the process fluid from the pump inlet to the pump outlet, and a pump shaft, on which each impeller is mounted, wherein the drive unit comprises a drive shaft for driving the pump shaft, and an electric motor for rotating the drive shaft about an axial direction, wherein a plurality of bearings is provided for supporting the pump shaft and the drive shaft, wherein a hydrodynamic coupling having a casing is provided for hydrodynamically coupling the drive shaft to the pump shaft by means of a transmission fluid, and wherein at least one of the plurality of bearings is arranged in the casing of the hydrodynamic coupling.

The invention relates to a water supply control method of a hot continuous rolling line ultra fast cooling system and belongs to the technical field of hot-rolled strip steel rolling. The water supply control method includes the following steps that: step one: the opening degree of a hydraulic coupler, namely, the flow curve of a pump station, is calibrated; step two: whether a strip steel head portion achieves a speed rise point is judged, if the strip steel head portion achieves the speed rise point, a rolling line transmits set pressure and total flow to the pump station, and step three is executed, otherwise, the step two is executed; step three: whether the set pressure and the set total flow which are transmitted to the pump station by the rolling line satisfy a set range is judged, if the set pressure and the set total flow satisfy the set range, an ultra fast cooling header is opened, and flow open-loop control and speed increase are performed on the pump station, and step four is executed, otherwise, alarming is performed; step four: whether the process of the speed increase is completed or not is judged, if the process of the speed increase is completed, a fuzzy PID control method is adopted to perform rolling line pressure dynamic regulation, otherwise, the step four is executed; and step five: whether a strip steel tail portion leaves an ultra fast cooling area is judged, if the strip steel tail portion leaves the ultra fast cooling area, the flow open-loop control is disconnected, the speed of the pump station is decreased to base speed, and a rolling line pressure dynamic regulation closed loop is disconnected, otherwise, the step five is executed.